
SN65ALS172A, SN75ALS172A
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS121C – AUGUST 1990 – REVISED MAY 1995
2–4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIK
Input clamp voltage
II = – 18 mA
– 1.5
V
VO
Output voltage
IO = 0
0
6
V
|VOD1 |
Differential output voltage
IO = 0
1.5
6
V
|VOD2 |
Differential output voltage
VCC = 5 V,
RL = 100
See Figure 1
1/2 VOD1
or 2
V
|VOD2 |
Differential output voltage
RL =54
See Figure 1
15
25
5
V
RL = 54
1.5
2.5
5
|VOD3 |
Differential output voltage
See Note 2
1.5
5
V
|VOD|
Change in magnitude of
differential output voltage§
R54
100
SFi
1
±0.2
V
VOC
Common-mode output voltage
RL = 54 or 100 ,
See Figure 1
+3
–1
V
|VOC|
Change in magnitude of
common-mode output voltage§
±0.2
V
IO
Output current with power off
VCC = 0,
VO = – 7 V to 12 V
±100
A
IOZ
High-impedance-state output current
VO = – 7 V to 12 V
±100
A
IIH
High-level input current
VI = 2.7 V
20
A
IIL
Low-level input current
VI = 0.4 V
– 100
A
IOS
Short-circuit output current
VO = – 7 V to 12 V
±250
mA
ICC
Supply current (all drivers)
No load
Outputs enabled
36
55
mA
ICC
Supply current (all drivers)
No load
Outputs disabled
15
30
mA
All typical values are at VCC = 5 V and TA = 25°C.
The minimum VOD2 with a 100- load is either 1/2 VOD1 or 2 V, whichever is greater.
§
|VOD| and |VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a
low level.
In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage,
VOS.
NOTE 2: See EIA Standard RS-485, Figure 3-5, Test Termination Measurement 2.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
td(OD)
Differential-output delay time
RL = 54 ,
See Figure 2
9
15
22
ns
tPZH
Output enable time to high level
RL = 110 ,
See Figure 3
30
45
70
ns
tPZL
Output enable time to low level
RL = 110 ,
See Figure 4
25
40
65
ns
tPHZ
Output disable time from high level
RL = 110 ,
See Figure 3
10
20
35
ns
tPLZ
Output disable time from low level
RL = 110 ,
See Figure 4
10
30
45
ns
All typical values are at VCC = 5 V and TA = 25°C.